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    • 3. 发明授权
    • Power control apparatus for high-frequency dielectric heating and power control method for the same
    • 用于高频介质加热和功率控制方法的功率控制装置相同
    • US08492687B2
    • 2013-07-23
    • US12620824
    • 2009-11-18
    • Haruo SuenagaKenji YasuiShinichi SakaiNobuo ShirokawaHideaki MoriyaManabu Kinoshita
    • Haruo SuenagaKenji YasuiShinichi SakaiNobuo ShirokawaHideaki MoriyaManabu Kinoshita
    • H05B6/66H05B6/68
    • H05B6/685Y02B40/143
    • A power control unit for high-frequency dielectric heating is provided, and includes an input current detection section for detecting input current from the AC power supply to the inverter circuit and outputting input current waveform information. A conversion section converts the input current waveform information into a drive signal of the switching transistor of the inverter circuit so that instantaneous fluctuation of the input current waveform information is suppressed. A mix circuit mixes the input current waveform information and power control information for controlling so that current or voltage at an arbitrary point of the inverter circuit becomes a predetermined value and generates an on voltage signal. The conversion section converts the on voltage signal into the drive signal so that the on time is shortened in the portion where the input current is large and that the on time is prolonged in the portion where the input current is small.
    • 提供了一种用于高频介电加热的功率控制单元,并且包括用于检测来自AC电源到逆变器电路的输入电流并输出输入电流波形信息的输入电流检测部分。 转换部分将输入电流波形信息转换成逆变器电路的开关晶体管的驱动信号,从而抑制输入电流波形信息的瞬时波动。 混合电路混合输入电流波形信息和用于控制的功率控制信息,使得逆变器电路的任意点处的电流或电压变为预定值,并产生导通电压信号。 转换部分将导通电压信号转换为驱动信号,使得在输入电流较大的部分中导通时间缩短,并且输入电流小的部分导通时间延长。
    • 7. 发明授权
    • High-frequency heating device
    • 高频加热装置
    • US08217323B2
    • 2012-07-10
    • US10599431
    • 2005-04-04
    • Haruo SuenagaHideaki MoriyaShinichi SakaiHisashi MorikawaToyotsugu MatsukuraNobuo Shirokawa
    • Haruo SuenagaHideaki MoriyaShinichi SakaiHisashi MorikawaToyotsugu MatsukuraNobuo Shirokawa
    • H05B6/66
    • H05B6/681H05B6/685Y02B40/143
    • An object of the present invention is to provide an inverter circuit in which soft start can be implemented by a simple circuit added thereto. In high-frequency heating apparatus for driving a magnetron, a DC power supply is chopped by two semiconductor switching devices, and this is output as an AC current through a resonance circuit. The high-frequency heating apparatus includes a dead time generation circuit for turning off the semiconductor switching devices concurrently. In the high-frequency heating apparatus, a drive unit for driving the aforementioned semiconductor switching devices has a function of limiting the lowest frequency of a frequency with which the semiconductor switching devices are driven. The aforementioned lowest frequency is set to be high at the beginning of operation of the high-frequency heating apparatus, and the aforementioned lowest frequency is set to be lower gradually thereafter.
    • 本发明的目的是提供一种逆变器电路,其中可以通过添加到其中的简单电路来实现软启动。 在用于驱动磁控管的高频加热装置中,由两个半导体开关器件将直流电源切断,并通过谐振电路作为交流电流输出。 高频加热装置包括用于同时关闭半导体开关装置的死区时间产生电路。 在高频加热装置中,用于驱动上述半导体开关器件的驱动单元具有限制驱动半导体开关器件的频率的最低频率的功能。 在高频加热装置的运转开始时,将上述最低频率设定得较高,之后将上述最低频率逐渐降低。
    • 8. 发明授权
    • High-frequency heating apparatus
    • 高频加热装置
    • US08017893B2
    • 2011-09-13
    • US10599961
    • 2005-04-22
    • Haruo SuenagaHideaki MoriyaShinichi SakaiHisashi MorikawaToyotsugu MatsukuraNobuo Shirokawa
    • Haruo SuenagaHideaki MoriyaShinichi SakaiHisashi MorikawaToyotsugu MatsukuraNobuo Shirokawa
    • H05B6/64
    • H05B6/666H02M3/33569
    • A purpose of the present invention is to provide an inverter circuit capable of suppressing an overshooting phenomenon of an input current at an instantaneous time when an initiating operation of the inverter circuit is switched to the normal operation thereof, and thus, capable of preventing damages of IGBTs and a magnetron.In a high frequency heating apparatus comprising: a control signal forming circuit for forming a control signal from a difference between an input current of an AC power supply and a reference current; a frequency modulated signal forming circuit for correcting rectified voltage/rectified current which are obtained by rectifying the AC voltage/current of the AC power supply based upon the control signal of the control signal forming circuit; and a dead time forming circuit for receiving the output of the frequency modulated signal forming circuit, a control signal converting circuit having a function capable of further lowering the value of the control signal is provided between the control signal forming circuit and the frequency modulated signal forming circuit.
    • 本发明的目的是提供一种逆变器电路,其能够在将逆变器电路的启动操作切换到其正常操作的瞬时时抑制输入电流的过冲现象,从而能够防止损坏 IGBT和磁控管。 一种高频加热装置,包括:控制信号形成电路,用于根据交流电源的输入电流与参考电流之间的差异形成控制信号; 基于所述控制信号形成电路的控制信号,对所述交流电源的交流电压/电流进行整流而得到的整流电压/整流电流的频率调制信号形成电路; 以及用于接收频率调制信号形成电路的输出的死区时间形成电路,具有能够进一步降低控制信号的值的控制信号转换电路被提供在控制信号形成电路和调制信号形成之间 电路。